USA Boys 10 & under - 50 M Back

These rankings show the swimmers' placement within the United States.
They are based on the swimmer's personal best, their current age category, and team; and are calculated from all the meets results.
For each swimmer, you can find the swimmer's ranking, their best time, the corresponding time standard, as well as how much faster the swimmer needs to be to reach the next level. The last columns provide information about the event they achieved this personal best.

Swimmer Rankings

Ranking Name Time Age Standard to Next Standard Team Date Meet
51 Christian Lo 38.87 10 AAA Min AAAA: 36.99 (+1.88s | 4.8%) Sierra Marlins Swim Team 07/31/2025 2025 Long Course Far Western Championship
52 Isaac Dai 38.91 8 AAA Min AAAA: 36.99 (+1.92s | 4.9%) Mission Viejo Nadadores 06/12/2025 2025 SCS June AG Invite @ La Mirada Armada
53 Heath Cobb 38.93 8 AAA Min AAAA: 36.99 (+1.94s | 5.0%) Metroplex Aquatics 07/16/2025 2025 Texas Age Group Championships
54 Ethan Canlas 38.96 9 AAA Min AAAA: 36.99 (+1.97s | 5.1%) Sandpipers of Nevada 06/12/2025 2025 SCS June AG Invite @ La Mirada Armada
55 Jefferson Chiang 38.98 9 AAA Min AAAA: 36.99 (+1.99s | 5.1%) Irvine Novaquatics 06/12/2025 2025 June Age Group Invite
56 Jaden Moy 38.99 10 AAA Min AAAA: 36.99 (+2.00s | 5.1%) Fast Falcons 12/05/2025 2025 Speedo Gator Holiday Classic
57 Francis Li 39.02 8 AA Min AAA: 38.99 (+0.03s | 0.1%) Unattached 08/07/2024 2024 EZ LC Age Group Championship
58 Logan Glick 39.04 9 AA Min AAA: 38.99 (+0.05s | 0.1%) Texas Ford Aquatics 07/16/2025 2025 Texas Age Group Championships
59 Harrison Carr 39.07 10 AA Min AAA: 38.99 (+0.08s | 0.2%) Aquajets Swim Team 06/26/2025 2025 MN AQJT Aquajets Summer Spectacular
60 Sinan Ozgur 39.08 9 AA Min AAA: 38.99 (+0.09s | 0.2%) Pleasanton Seahawks 07/31/2025 2025 Long Course Far Western Championship
61 Marco Sun 39.14 9 AA Min AAA: 38.99 (+0.15s | 0.4%) Pleasanton Seahawks 06/07/2025 2025 06 07 CDST LC C B BB+ Meet
62 Eric Cooper 39.18 9 AA Min AAA: 38.99 (+0.19s | 0.5%) Unattached 08/07/2024 2024 EZ LC Age Group Championship
63 Declan Bannan 39.21 10 AA Min AAA: 38.99 (+0.22s | 0.6%) Rancho San Dieguito 07/24/2025 2025 SI LC AG CHAMPS
64 August Liao 39.31 9 AA Min AAA: 38.99 (+0.32s | 0.8%) Canyons Aquatic Club 07/24/2025 2025 CA SCS Summer A G Champs CANY
65 Spencer Slowik 39.31 10 AA Min AAA: 38.99 (+0.32s | 0.8%) Bainbridge Island Swim Club 07/11/2025 2025 PN OCA July Jamboree Invitational
66 Harry Zhou 39.35 10 AA Min AAA: 38.99 (+0.36s | 0.9%) Aquajets Swim Team 07/23/2025 2025 MN NSAC 10 U LC State Championship
67 Aurelius Lien 39.41 8 AA Min AAA: 38.99 (+0.42s | 1.1%) Santa Clara Swim Club 07/31/2025 2025 Long Course Far Western Championship
68 Michael Levell 39.42 9 AA Min AAA: 38.99 (+0.43s | 1.1%) Brownell Talbot 05/09/2025 2025 SD SFST Ready For Long Course
69 Zachary Snyder 39.44 9 AA Min AAA: 38.99 (+0.45s | 1.1%) Madison Area YMCA Mariners 08/06/2025 2025 Summer Elite Showcase
70 Lucas Stocker 39.57 9 AA Min AAA: 38.99 (+0.58s | 1.5%) Coastal Machine Aquatics Club 07/23/2025 2025 CA SCS Summer A G Champs
71 Mason Lankford 39.57 9 AA Min AAA: 38.99 (+0.58s | 1.5%) Hydro Swim Club 07/10/2025 2025 FL Summer Age Group Championships
72 Maxwell Dean 39.58 9 AA Min AAA: 38.99 (+0.59s | 1.5%) Voltage Aquatics 07/18/2025 2025 LCM Summer Championships
73 Ryan Latronica 39.59 9 AA Min AAA: 38.99 (+0.60s | 1.5%) Hills Hurricane Swimming 07/31/2025 2025 Long Course Far Western Championship
74 Wayne Sun 39.59 10 AA Min AAA: 38.99 (+0.60s | 1.5%) Katy Aquatic Team For Youth 07/16/2025 2025 Texas Age Group Championships
75 Morgan Dasilva 39.65 10 AA Min AAA: 38.99 (+0.66s | 1.7%) Asphalt Green Unified Aquatics 08/06/2025 2025 Summer Elite Showcase
76 Gavin Schwartz 39.66 10 AA Min AAA: 38.99 (+0.67s | 1.7%) North Bay Aquatics 07/31/2025 2025 Long Course Far Western Championship
77 Kevin Kubasik 39.67 9 AA Min AAA: 38.99 (+0.68s | 1.7%) Mission Viejo Nadadores 07/25/2024 2024 CA SCS GWSC Summer A G Champs
78 Ray Yu 39.73 9 AA Min AAA: 38.99 (+0.74s | 1.9%) Aquazot Swim Club 07/24/2025 2025 CA SCS RAA Summer A G Champs
79 Matvey Fadeev 39.73 9 AA Min AAA: 38.99 (+0.74s | 1.9%) Issaquah Swim Team 07/24/2025 2025 PN LC 12 U Championships
80 Jonathan Nelson 39.82 9 AA Min AAA: 38.99 (+0.83s | 2.1%) Utah Valley Aquatics 07/17/2025 2025 UTAGS LC Championships
81 Riccardo Sardena 39.82 9 AA Min AAA: 38.99 (+0.83s | 2.1%) Swim Team of Placentia 06/12/2025 2025 CA SCS RAA June Age Group Championships
25 Back
38.23
38.23
50 Back
1.59
39.82
50 Back
39.82
82 Joseph Tomicic 39.84 9 AA Min AAA: 38.99 (+0.85s | 2.1%) Katy Aquatic Team For Youth 07/16/2025 2025 Texas Age Group Championships
83 Trevor Lam 39.85 8 AA Min AAA: 38.99 (+0.86s | 2.2%) Dare Aquatics 07/23/2025 2025 CA SCS Summer A G Champs
84 William Xing 39.94 10 AA Min AAA: 38.99 (+0.95s | 2.4%) Olympus Aquatics 07/17/2025 2025 UTAGS LC Championships
85 Russell Choy 39.94 9 AA Min AAA: 38.99 (+0.95s | 2.4%) Aquazot Swim Club 06/12/2025 2025 SCS June AG Invite @ La Mirada Armada
86 Vance Hull 39.95 9 AA Min AAA: 38.99 (+0.96s | 2.4%) Unattached 08/07/2024 2024 EZ LC Age Group Championship
87 Harrison Millard 39.99 10 AA Min AAA: 38.99 (+1.00s | 2.5%) Bellingham Bay Swim Team 07/24/2025 2025 PN LC 12 U Championships
88 Mason Kim 40.02 10 AA Min AAA: 38.99 (+1.03s | 2.6%) Maywood Sparks Swim Team 07/24/2025 2025 CA SCS RAA Summer A G Champs
89 Arash Thokade 40.04 9 AA Min AAA: 38.99 (+1.05s | 2.6%) Unattached 07/31/2025 2025 Central Zone 14 Under Championship Mee
90 Finn McGuire 40.06 10 AA Min AAA: 38.99 (+1.07s | 2.7%) Swim Florida 06/20/2025 2025 GCST MARK MCCAW SUMMER
91 Winston Du 40.07 9 AA Min AAA: 38.99 (+1.08s | 2.7%) Aquajets Swim Team 07/23/2025 2025 MN NSAC 10 U LC State Championship
92 Colton Mueller 40.08 9 AA Min AAA: 38.99 (+1.09s | 2.7%) Coast Gaurd Blue Dolphins 07/11/2024 2024 VSI Regional Summer Awards
93 Allen Chen 40.18 9 AA Min AAA: 38.99 (+1.19s | 3.0%) Seattle Metropolitan Aquatic C 07/24/2025 2025 PN LC 12 U Championships
94 Johann Gomez Ugalde 40.19 9 AA Min AAA: 38.99 (+1.20s | 3.0%) Southwest Stars Swim Club 05/16/2025 2025 PA Long Course Invite
95 Alexander Fang 40.21 10 AA Min AAA: 38.99 (+1.22s | 3.0%) Reno Aquatic Club 07/31/2025 2025 Long Course Far Western Championship
96 Oscar Holler 40.21 10 AA Min AAA: 38.99 (+1.22s | 3.0%) Milpitas Aquatic Club 05/23/2025 Zone 1 South May Firecracker 500
97 Kennedy Whiting 40.22 10 AA Min AAA: 38.99 (+1.23s | 3.1%) Minnetonka Swim Club 07/23/2025 2025 MN NSAC 10 U LC State Championship
98 Kamran Clapp 40.22 10 AA Min AAA: 38.99 (+1.23s | 3.1%) Bellevue Club Swim Team 07/24/2025 2025 PN LC 12 U Championships
99 Javier Cabral 40.23 10 AA Min AAA: 38.99 (+1.24s | 3.1%) Unattached 08/06/2025 2025 Western Zone Age Group Championships
100 Zachary Zeng 40.40 9 AA Min AAA: 38.99 (+1.41s | 3.5%) Waterloo Swimming 07/10/2025 2025 ST AAAA STAGS LC Championship

Disclaimer: This Website is not affiliated with USA Swimming or any Local Swim Committee. The rankings and times displayed on this website are unofficial and should not be viewed as such. We update our information regularly, but we cannot guarantee that the data is accurate, timely, or complete. The only purpose of this website is entertainment. None of the information here should be used for university admission applications.